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usrp/README: clarified distance between antennas and fixed typos in examples
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usrp/README
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usrp/README
@ -25,9 +25,9 @@ contamination from other sources.
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(The same setup may also work with a USRP1 or UN210, and a RFX2400
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board.)
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Both should be spaced at least twenty times the wavelength, or 2.5 m
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apart. For test runs that can be compared with each other, antenna
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placement and orientation have to be exactly the same.
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Both should be spaced at least twenty times the wavelength (12.5 cm at
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2405 MHz), or 2.5 m apart. For test runs that can be compared with each
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other, antenna placement and orientation have to be exactly the same.
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The sender runs tools/atrf-txrx/atrf-txrx, the receiver runs utilities
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from gnuradio.
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@ -129,7 +129,7 @@ contamination from other sources.
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7) Obtain the peaks from all measurements
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gnuplot> plot "<for n in 100/tmp*; do ./fft -s 100 5 15 50 <$n;done" \
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gnuplot> plot "<for n in 100/tmp*; do ./fft -s 100 0 20 50 <$n;done" \
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with lines
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^ ^ ^ ^
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@ -142,7 +142,7 @@ contamination from other sources.
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8) The final result for one measurement run can be obtained as follows:
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for n in 100/tmp*; do ./fft -s 100 0 200 50 <$n;done | ./range -v 2
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for n in 100/tmp*; do ./fft -s 100 0 20 50 <$n;done | ./range -v 2
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In this example, "range" eliminates all outliers more than 2 dB from
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the average and reports this.
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